What has lots of eyes, but can’t see?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

There are 3 apples in the basket and you take away 2. How many apples do you have now?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Find the missing number in the image below.

Jessica is telling her friends this story and asks them to guess if it’s the truth or a lie: “There was a man sitting in a house at night that had no lights on at all. There was no lamp, no candle, and no other source of light. Yet, he sat in the house and read his book happily.” Her friends say she’s lying, but Jessica corrects them and says she’s telling the truth. Jessica’s story is true—but how?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?